foo.cc: In function 'int main()':
foo.cc:42:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   42 |     scanf("%d%d%d",&n,&s,&m);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:44:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   44 |         scanf("%d%d%d",&aa,&bb,&cc);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

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